Buckle



FIG. 1 is a perspective view of a buckle showing the new design;

FIG. 2 is a left side view thereof, the right side being the same as the left side;

FIG. 3 is a back side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a front side elevational view thereof.

The bottom of the buckle is not viewable when in use. Thus, the bottom view has not been provided. The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a buckle, as shown and described herein. 